JP4871619B2 - Screw feeder for continuous screw tightening machine - Google Patents

Description

  The present invention relates to a screw feeding device of a continuous screw tightening machine that feeds a screw connection band downward of a screw tightening machine in conjunction with a screw tightening operation of the screw tightening machine in order to tighten the screws continuously.

Conventionally, screw feeders described in Patent Documents 1 and 2 are known.
The screw feeding device described in Patent Literatures 1 and 2 includes a cylindrical base casing that is attached to a screw tightening machine, a feeder casing that is movable relative to the base casing, and a screw supply that is provided in the feeder casing. I have a device. The screw supply device is provided on the base end side (upper side) of the feeder casing, and supplies the screw of the screw connection band to the tip of the driver bit when the feeder casing moves relative to the base casing. The diameter of the base casing is large enough to accommodate the base end portion of the feeder casing and the screw supply device provided at the base end portion, and the length is substantially the same as the driver bit. The tip position (lower end position) of the base casing at the time of completion of screw tightening was close to the tip of the feeder casing and close to the workpiece. For this reason, when the screw is tightened in a narrow place, the tip of the base casing may become an obstacle. That is, cornering may not be easy due to the tip of the feeder casing.
Japanese Patent Laid-Open No. 4-111781 JP-A-8-216043

Therefore, a method of shortening the length of the base casing is also conceivable in order to move the tip position of the base casing away from the workpiece when screw tightening is completed. However, if the base casing is short, the moving distance of the feeder casing with respect to the base casing becomes short, which causes a problem that it is impossible to fasten a long screw.
Accordingly, an object of the present invention is to provide a screw feeding device for a continuous screw tightening machine that is suitable for cornering and has little influence on the length of a screw that can be tightened.

In order to solve the above-mentioned problems, the present invention is a screw feeding device of a continuous screw tightening machine having a configuration as described in each claim.
According to the first aspect of the present invention, at least one intermediate casing is provided between the base casing and the feeder casing, and these casings are arranged in series in the screw tightening direction in the order of the base casing, the intermediate casing, and the feeder casing. And connected so as to be relatively movable in the screw tightening direction.

Therefore, since the intermediate casing is provided between the base casing and the feeder casing, the length of the base casing can be shortened without changing the overall length of the screw feeder. Therefore, the position of the tip of the base casing when the screw tightening is completed can be separated from the workpiece. As a result, it is possible to suppress the cornering from becoming difficult due to the tip portion of the base casing.
Further, since the feeder casing moves relative to the base casing via the intermediate casing, a large amount of movement of the feeder casing relative to the base casing can be secured. Therefore, the length of the screw that can be tightened can be increased without changing the overall length of the screw feeder.

According to invention of Claim 1 and 3 , the rolling element is provided in the intermediate casing so that rolling is possible. The rolling element abuts on another casing and rolls by moving the intermediate casing relative to the other casing.
Therefore, the intermediate casing can move smoothly with respect to the other casings by the rolling elements. In addition, the rolling element can suppress the backlash of the intermediate casing with respect to the other casing. Therefore, it is also possible to suppress the screw collapse that may occur due to the backlash of the intermediate casing.

According to the first aspect of the present invention, the rolling element penetrates the wall surface of the cylindrical intermediate casing in the thickness direction, contacts the casing disposed outside the intermediate casing, and is disposed inside the intermediate casing. It is also in contact with the arranged casing. And these three casings are interlocked and moved relatively in the screw tightening direction by the rolling elements.
Therefore, since the three casings can be interlocked by the rolling elements, the operation timings of these casings can always be the same. Therefore, for example, by always making the operation timing of the feeder casing the same, it is possible to always make the timing of supplying the screw connection band the same.

According to the invention described in claim 2, the cylindrical intermediate casing, the rolling elements are kicked multiple set to the screw tightening direction. The intermediate casing and the casing disposed outside or inside the intermediate casing are configured to be always supported at two or more positions in the screw tightening direction by at least two of the plurality of rolling elements.
Therefore, since the intermediate casing and the other casing are always supported at two points in the moving direction by the rolling elements, the intermediate casing and the other casing move in a state in which rattling is prevented. And it is possible to prevent screw fall due to looseness of the casing.

According to invention of Claim 3 , a rolling element is a cylindrical roller.
Therefore, the rolling element can be configured with an easy configuration.

According to the invention described in claim 4 , the rolling element is a pinion, and is formed in a rack formed in a casing disposed outside the intermediate casing and a casing disposed inside the intermediate casing. It is configured to mesh with the rack.
Therefore, the three casings can be reliably interlocked by the pinion and the rack.

(Embodiment 1)
The continuous screw tightening machine 10 of Embodiment 1 is demonstrated according to FIGS.
As shown in FIG. 1, the continuous screw tightening machine 10 includes a screw tightening machine 11 and a screw feeder 1 that supplies a screw connection band B below the screw tightening machine 11.
The screw tightening machine 11 has a housing 12 formed in a substantially D shape. The housing 12 has a motor housing portion 12a and a grip portion 12b, and a drive motor 13, a reduction gear train 16 and a clutch mechanism 17 are incorporated in the motor housing portion 12a. A power switch 14 is incorporated in the grip portion 12 b, and a trigger 15 is provided at the tip of the protruding and retracting pin of the power switch 14.

By pulling the trigger 15 and turning on the power switch 14, electric power is supplied to the drive motor 13. Then, the output shaft of the drive motor 13 rotates and the shaft rotational force is transmitted to the spindle 18 through the reduction gear train 16 and the clutch mechanism 17.
The spindle 18 is supported by a bearing 19 provided at the lower end portion of the motor housing portion 12a so as to be rotatable and movable in a certain range in the axial direction. The front end portion of the spindle 18 protrudes from the motor housing portion 12a, and a mounting hole to which the driver bit 20 is detachably attached is formed on the front end surface.

The clutch mechanism 17 is in a connected state when the spindle 18 moves to the upper position, and is in a disconnected state at the lower position.
A screw feeder 1 and a guide member 9 are attached to the motor housing portion 12a as shown in FIG.
The guide member 9 has a guide path 9a for guiding the screw connection band B, and the screw connection band B is supplied to the screw feeder 1 through the guide path 9a.

The screw feeding device 1 is a device for feeding the screw connection band B one pitch at a time, and has a base casing 2, an intermediate casing 3, and a feeder casing 4 as shown in FIG.
As shown in FIGS. 2 and 3, the base casing 2 has a base tube portion 2a having a substantially square tube shape and a base bottom portion 2b covering the upper portion of the base tube portion 2a. A hole 2c through which the bearing 19 is inserted is formed in the base bottom 2b. As shown in FIG. 1, an attachment portion 2 d that is detachably attached to the guide member 9 is provided on the side surface of the base cylinder portion 2 a. Therefore, the base casing 2 is detachably attached to the housing 12 via the guide member 9.

As shown in FIGS. 2 and 3, the intermediate casing 3 includes a rectangular tubular intermediate tube portion 3 a and an upper tube portion 3 b extending in a cylindrical shape from the upper end of the intermediate tube portion 3 a.
A plurality of through holes 3d to 3f for accommodating the rolling elements 6a to 6c are formed in the intermediate cylinder portion 3a. The through holes 3 d to 3 f are formed in the intermediate cylinder portion 3 a in a plurality of upper and lower rows (a plurality of rows in the screw tightening direction), and the through hole 3 d is formed near the lower end portion of the intermediate casing 3. A through hole 3 e is formed at the vertical center position of the intermediate casing 3, and a through hole 3 f is formed near the upper end of the intermediate casing 3.
As shown in FIG. 5, two through holes 3e are formed on each component surface of the intermediate cylinder portion 3a, and the rolling elements 6b are accommodated in the respective through holes 3e. Two through-holes 3d and 3f are formed on each component surface of the intermediate cylinder portion 3a similarly to the through-hole 3e, and the rolling elements 6a and 6c are accommodated in the respective through-holes 3d and 3f.

The rolling elements 6a to 6c are cylindrical rollers as shown in FIGS. 2 and 5, and are accommodated in the through holes 3d to 3f so as to be able to roll. The rolling element 6b has a rotation shaft 6b1 that is rotatably attached to the intermediate cylinder portion 3a. Similarly to the rolling element 6b, the rolling elements 6a and 6c also have a rotation shaft that is rotatably attached to the intermediate cylinder portion 3a.
As shown in FIG. 2, the intermediate cylinder part 3a has a diameter smaller than that of the base cylinder part 2a, and is accommodated in the base cylinder part 2a so as to protrude and retract. As shown in FIGS. 2, 4, and 6, the rolling elements 6 a to 6 c are in contact with the base cylinder portion 2 a located outside the intermediate cylinder portion 3 a and move the intermediate casing 3 up and down relative to the base casing 2. Roll to.

  Between the intermediate casing 3 and the base casing 2, there is provided a biasing member 21 that constantly biases the intermediate casing 3 downward (screw tightening direction) with respect to the base casing 2, as shown in FIG. The urging member 21 is a compression coil, and an upper end thereof is in contact with the base bottom 2 b of the base casing 2. The lower end portion of the urging member 21 is installed so as to cover the upper cylindrical portion 3b of the intermediate casing 3, and the lower end surface is in contact with a flange portion 3c formed at the lower end portion of the upper cylindrical portion 3b.

As shown in FIGS. 2 and 3, the feeder casing 4 includes a feeder tube portion 4a formed in a square tube shape, a feeder tip portion 4b extending downward from the feeder tube portion 4a, and a cylinder from the upper end of the feeder tube portion 4a. It has the upper cylinder part 4c extended in the shape.
As shown in FIG. 3, the feeder tip portion 4b extends downward from the left and right surfaces of the feeder cylinder portion 4a and is connected at the tip portion, and the tip portion is tapered. A through hole 4f through which the screw S is penetrated is formed at the front end surface of the feeder front end 4b, and a fall prevention piece 4e for preventing the screw S from falling down is provided at the side of the through hole 4f. Yes.

  As shown in FIG. 2, the feeder cylinder part 4a is smaller in diameter than the intermediate cylinder part 3a and is inserted into the intermediate cylinder part 3a so as to be movable up and down. As shown in FIGS. 2, 4, and 6, the rolling elements 6 a to 6 c roll in contact with the feeder cylinder 4 a when the feeder cylinder 4 a is moved up and down on the intermediate cylinder 3 a.

  Between the feeder casing 4 and the intermediate casing 3, there is provided a biasing member 22 that constantly biases the feeder casing 4 downward (screw tightening direction) with respect to the intermediate casing 3, as shown in FIG. The urging member 22 is a compression coil, and an upper end portion thereof is in contact with an inner overhang portion 3 h formed at the upper end portion of the intermediate casing 3. The lower end portion of the urging member 22 is installed so as to cover the upper cylinder portion 4c of the feeder casing 4, and the lower end surface is in contact with a flange portion 3c formed on the outer periphery of the lower end portion of the upper cylinder portion 4c.

As shown in FIG. 2, the feeder cylinder part 4a is provided with a screw supply device 5 for feeding the screw connection band B into the feeder cylinder part 4a by one pitch.
The screw supply device 5 includes a ratchet wheel 5a and a ratchet disk 5b.
The ratchet wheel 5a has a drum shape, and is attached to the feeder cylinder portion 4a so as to be rotatable. A feed claw is formed on the outer periphery of the ratchet wheel 5a. When the ratchet wheel 5a rotates, the feed claw engages with a feed hole formed in the screw connection band B and feeds the screw connection band B to the left in FIG.

The ratchet disk 5b is rotatably attached to the side surface of the ratchet wheel 5a as shown in FIG. A one-way clutch is configured between the ratchet wheel 5a and the ratchet disc 5b. The one-way clutch rotates the ratchet wheel 5a clockwise together with the ratchet disk 5b when the ratchet disk 5b rotates clockwise, and applies the rotational force of the ratchet disk 5b to the ratchet wheel 5a when the ratchet disk 5b rotates counterclockwise. It is configured not to transmit.
Above the ratchet wheel 5a, an inversion prevention member 5d that engages with the claw of the ratchet wheel 5a and prevents the ratchet wheel 5a from rotating counterclockwise is provided.

As shown in FIGS. 2 and 5, a roller pin 5c protrudes from the side surface of the ratchet disk 5b, and the roller pin 5c protrudes into a long hole 3g formed in the intermediate cylinder portion 3a.
The long hole 3g has a straight portion 3g1 extending in the vertical direction and a curved portion 3g2 that curves from the lower end of the straight portion 3g1 toward the center of the ratchet wheel 5a. Therefore, when the feeder casing 4 is moved upward with respect to the intermediate casing 3, the roller pin 5c is guided to the curved portion 3g2. For this reason, the ratchet disk 5b rotates clockwise, and the ratchet wheel 5a rotates clockwise via the one-way clutch. Then, the screw connection band B is fed into the feeder casing 4 by one pitch (one screw) by the ratchet wheel 5a.

  When the feeder casing 4 is moved downward with respect to the intermediate casing 3, the roller pin 5c is guided by the curved portion 3g2 and the ratchet disk 5b rotates counterclockwise. However, the ratchet wheel 5a is not rotated by the one-way clutch. Therefore, the screw supply device 5 sends the screw connection band B into the feeder casing 4 by one pitch by a single vertical movement of the feeder casing 4 with respect to the intermediate casing 3.

When the screw S is tightened by the continuous screw tightening machine 10, the trigger 15 is pulled and the drive motor 13 is activated with the tip of the feeder casing 4 pressed against the upper surface of the workpiece.
Next, the screw tightening machine 11 is moved toward the workpiece (downward). As a result, the feeder casing 4 moves upward relative to the intermediate casing 3 as shown in FIGS. 4 and 6, and the intermediate casing 3 moves upward relative to the base casing 2. Then, the roller pin 5c is guided to the long hole 3g, the ratchet wheel 5a rotates, and the screw connection band B is fed by one pitch by the ratchet wheel 5a.

  When the screw tightening machine 11 is further moved downward toward the work, the tip of the screw S comes into contact with the work, and the head of the screw S comes into contact with the driver bit 20. Then, the spindle 18 moves relatively upward with respect to the screw tightening machine 11, and the clutch mechanism 17 is connected. As a result, the spindle 18 rotates and the screw S is fastened to the workpiece.

In the screw tightening operation, as shown in FIGS. 2, 4, and 6, the feeder casing 4 relatively moves up and down while being supported by the rolling elements 6 a to 6 c with respect to the intermediate casing 3. And it moves up and down relatively in a state where it is always supported at two points in the screw tightening direction (vertical direction) by at least one rolling element 6a and at least one rolling element 6b.
Similarly, the intermediate casing 3 moves up and down relatively while being supported with respect to the base casing 2 by the rolling elements 6a to 6c. And it moves up and down relatively in a state where it is always supported at two points in the screw tightening direction (vertical direction) by at least one rolling element 6b and at least one rolling element 6a.

As shown in FIG. 8, the intermediate casing 3 enters the base casing 2 when the screw tightening is completed, and the lower end portion is positioned above the lower end portion of the base casing 2. On the other hand, the feeder casing 4 protrudes below the base casing 2. For this reason, the screw S can be tightened (corned) in the corner area A which is a narrow place.
As shown in FIG. 3, openings 2c, 3j, and 4g through which the screw connection band B is inserted are formed on the front and rear surfaces (the front side and the back side) of the base cylinder part 2a, the intermediate cylinder part 3a, and the feeder cylinder part 4a. Is formed. The openings 2c, 3j, and 4g open the lower ends of the cylindrical portions 2a to 4a, communicate with each other by relative movement of the cylindrical portions 2a to 4a, and can always feed the screw connection band B into the feeder casing 4. It is configured.

The first embodiment is formed as described above.
That is, an intermediate casing 3 is provided between the base casing 2 and the feeder casing 4 as shown in FIG. 2, and these casings 2 to 4 are screwed in the order of the base casing 2, the intermediate casing 3, and the feeder casing 4. It is connected in series with the direction and relatively movable in the screw tightening direction.

Therefore, since the intermediate casing 3 is provided between the base casing 2 and the feeder casing 4, the length of the base casing 2 can be shortened. Therefore, as shown in FIG. 8, the height position of the tip of the base casing 2 from the workpiece when the screw tightening is completed can be increased, and it is possible to suppress the cornering from being difficult to be cornered by the tip of the base casing 2.
Further, since the intermediate casing 3 is provided, it is not necessary to increase the length of the base end portion of the feeder casing 4. Therefore, when the base end part length of the feeder casing 4 becomes long, the movement distance with respect to the base casing 2 of the feeder casing 4 is suppressed, and the problem that the screw length which can be tightened becomes short can be avoided.

Accordingly, since the intermediate casing 3 is provided between the base casing 2 and the feeder casing 4, the length of the base casing 2 can be shortened without changing the overall length of the screw feeder 1. Therefore, the position of the tip end portion of the base casing 2 when the screw tightening is completed can be separated from the work as shown in FIG. As a result, it is possible to suppress the cornering from becoming difficult due to the distal end portion of the base casing 2.
Moreover, since the feeder casing 4 moves with respect to the base casing 2 via the intermediate casing 3, a large amount of movement of the feeder casing 4 with respect to the base casing 2 can be secured. Therefore, the length of the screw that can be tightened can be increased without changing the overall length of the screw feeder 1.

Further, as shown in FIG. 2, rolling elements 6 a to 6 c are provided in the intermediate casing 3 so as to be able to roll. And the rolling elements 6a-6c contact | abut to another casing (2, 4), and roll by moving the intermediate casing 3 relatively with respect to another casing.
Therefore, the intermediate casing 3 can move smoothly with respect to the other casings by the rolling elements 6a to 6c. In addition, the rolling elements 6a to 6c can suppress the backlash of the intermediate casing 3 with respect to other casings. And the screw fall which may arise by the backlash of the intermediate casing 3 can also be suppressed.

Further, as shown in FIG. 2, the rolling elements 6 a to 6 c penetrate the wall surface of the cylindrical intermediate casing 3 in the thickness direction, abut against the casing (2) disposed outside the intermediate casing 3, and the intermediate casing. 3 is also in contact with the casing (4) disposed inside. These three casings 2 to 4 are configured to move relative to each other in the screw tightening direction in conjunction with the rolling elements 6a to 6c.
Therefore, since three casings can be interlocked by the rolling elements 6a-6c, the operation timing of these casings can always be made the same. Therefore, for example, by always making the operation timing of the feeder casing 4 the same, the supply timing of the screw connection band B can always be made the same.

The intermediate casing 3 is provided with a plurality of rolling elements 6a to 6c in the screw tightening direction as shown in FIGS. The intermediate casing 3 and the casings (2, 4) disposed outside or inside the intermediate casing 3 are always supported at two or more positions in the screw tightening direction by at least two of the plurality of rolling elements 6a to 6c. It is configured to be.
Therefore, since the intermediate casing 3 and the other casings (2, 4) are always supported at two points in the moving direction by the rolling elements 6a to 6c, the intermediate casing 3 and the other casings (2 and 4) move in a state in which rattling is prevented. And it is possible to prevent screw fall due to looseness of the casing.

The rolling elements 6a to 6c are cylindrical rollers as shown in FIGS.
Accordingly, the rolling elements 6a to 6c can be configured with an easy configuration.

(Embodiment 2)
The second embodiment will be described with reference to FIGS.
The second embodiment is formed in substantially the same manner as the first embodiment, but has a screw supply device 7 and a long hole 3k shown in FIG. 9 instead of the screw supply device 5 and the long hole 3g shown in FIG. is doing. The first embodiment has two urging members 21 and 22 as shown in FIG. 2, whereas the second embodiment has one urging member 23 as shown in FIG. ing. Hereinafter, Embodiment 2 will be described focusing on these differences.

As shown in FIGS. 9 and 10, the screw supply device 7 includes a ratchet wheel 7a, an intermediate gear 7b meshing with the ratchet wheel 7a, and an arm 7c attached to the intermediate gear 7b so as to be tiltable.
The ratchet wheel 7a has a drum shape and is attached to the feeder cylinder portion 4a so as to be rotatable about the shaft. The ratchet wheel 7a has a feed claw that engages with a feed hole of the screw connection band on the outer peripheral portion.

The intermediate gear 7b is provided in the feeder cylinder part 4a so as to be rotatable about the shaft, and meshes with the ratchet wheel 7a.
The arm 7c is attached to the center of the intermediate gear 7b so as to be tiltable within a certain angle range. A one-way clutch is formed between the intermediate gear 7b and the arm 7c, and an anti-reverse mechanism prevents the intermediate gear 7b from rotating clockwise by engaging with the claw of the intermediate gear 7b above the intermediate gear 7b. A member 7e is provided.

As shown in FIG. 9, a roller pin 7d projects from the side surface of the arm 7c, and the roller pin 7d projects into a long hole 3k formed in the intermediate cylinder portion 3a.
The long hole 3k has a straight portion 3k1 extending in the vertical direction, and a curved portion 3k2 curved from the lower end portion of the straight portion 3k1 toward the center of the intermediate gear 7b. Therefore, when the feeder casing 4 moves upward with respect to the intermediate casing 3, the roller pin 7d is guided by the curved portion 3k2, and the arm 7c tilts clockwise. Then, the intermediate gear 7b rotates counterclockwise, the ratchet wheel 7a rotates clockwise via the one-way clutch, and the screw connection band is fed by one pitch by the ratchet wheel 7a. On the other hand, when the feeder casing 4 moves downward with respect to the intermediate casing 3, the roller pin 7d is guided by the long hole 3k and the arm 7c tilts counterclockwise, but the intermediate gear 7b does not rotate by the one-way clutch.

Between the feeder casing 4 and the base casing 2, there is provided a biasing member 23 that constantly biases the feeder casing 4 downward (screw tightening direction) with respect to the base casing 2. The urging member 23 is a compression coil, and the upper end portion is installed so as to cover the bearing 19, and the upper end surface is brought into contact with the base bottom portion 2 b of the base casing 2. The lower end portion of the urging member 23 is installed inside the upper cylindrical portion 4c of the feeder casing 4, and the lower end surface is in contact with an inner overhanging portion 4h formed at the lower end portion of the upper cylindrical portion 4c.
In addition, the intermediate casing 3 does not have an upper cylinder part (3b shown in FIG. 2), as shown in FIG.

In the screw tightening operation, as shown in FIGS. 9 and 10, the feeder casing 4 moves up and down relatively while being supported with respect to the intermediate casing 3 by the rolling elements 6 a to 6 c. And it moves up and down relatively in a state where it is always supported at two points in the screw tightening direction (vertical direction) by at least one rolling element 6a and at least one rolling element 6b.
Similarly, the intermediate casing 3 moves up and down relatively while being supported with respect to the base casing 2 by the rolling elements 6a to 6c. And it moves up and down relatively in a state where it is always supported at two points in the screw tightening direction (vertical direction) by at least one rolling element 6b and at least one rolling element 6a.

(Embodiment 3)
A third embodiment will be described with reference to FIG.
The third embodiment is formed in substantially the same manner as the second embodiment, but has a rolling element (pinion) 25 shown in FIG. 11 instead of at least one of the rolling elements (rollers) 6b shown in FIG. Is different. Hereinafter, Embodiment 3 will be described focusing on the differences.

The rolling element 25 is a pinion (gear), and is rotatably accommodated in a through hole 3 e formed in the intermediate casing 3.
Racks 2 j and 4 j are formed on the inner peripheral surface of the base casing 2 corresponding to the rolling elements 25 and the outer peripheral surface of the feeder casing 4. The racks 2j and 4j extend vertically, and always mesh with the rolling elements 25 when the intermediate casing 3 is moved up and down with respect to the base casing 2. Therefore, the base casing 2, the intermediate casing 3, and the feeder casing 4 are reliably interlocked by the rolling elements 25 and the racks 2j and 4j.

(Other embodiments)
The present invention is not limited to the first to third embodiments, and may be the following modes.
(1) That is, the rolling elements according to the first and second embodiments are rollers or pinions. However, the rolling element may be a spherical ball.
(2) One intermediate casing is provided between the base casing and the feeder casing described in the first and second embodiments. However, two or more intermediate casings are provided between the base casing and the feeder casing, and these casings are arranged in series in the screw tightening direction in the order of the base casing, each intermediate casing, and the feeder casing, and relatively in the screw tightening direction. The form connected so that a movement is possible may be sufficient.
(3) The screw feeder according to the first and second embodiments has one intermediate casing and rolling elements provided in the intermediate casing. The rolling element is configured to roll in contact with the base casing and the feeder casing. However, the screw feeder may have a plurality of intermediate casings, and a rolling element provided in one intermediate casing may be in contact with another intermediate casing and roll.

3 is a left side sectional view of the continuous screw tightening machine according to Embodiment 1. FIG. FIG. 3 is a left side sectional view of the screw feeding device according to the first embodiment. It is a hand front view from the operator side of the screw feeder which concerns on Embodiment 1. FIG. It is a left side sectional view of the screw feeder concerning Embodiment 1 in the middle of screw tightening work. FIG. 5 is a cross-sectional view taken along line VV in FIG. 4. It is a left side sectional view of the screw feeder concerning Embodiment 1 at the time of screw tightening work completion. It is a hand front view from the operator side of the screw feeder which concerns on Embodiment 1 at the time of screw fastening operation | work completion. It is a hand front view from the operator side of the screw feeder which concerns on Embodiment 1 at the time of screw fastening operation | work completion. FIG. 6 is a left side sectional view of a continuous screw tightening machine according to a second embodiment. It is sectional drawing on the left side of the screw feeder which concerns on Embodiment 2 at the time of screw fastening operation | work completion. It is sectional drawing on the left side of the screw feeder which concerns on Embodiment 3 at the time of screw fastening operation completion.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Screw feeder 2 ... Base casing 2a ... Base cylinder part 2j, 4j ... Rack 3 ... Intermediate casing 3a ... Intermediate cylinder parts 3d-3f ... Through-hole 3g, 3k ... long hole 4 ... feeder casing 4a ... feeder cylinder 4b ... feeder tip 5, 7 ... screw feeders 6a-6c ... rolling elements (rollers)
9 ... guide member 10 ... continuous screw tightening machine 11 ... screw tightening machine 12 ... housing 17 ... clutch mechanism 18 ... spindle 20 ... driver bits 21-23 ... with Force member 25 ... rolling element (pinion)
B ... Screw connection band

Claims (4)

A base casing attached to the screw tightening machine; a feeder casing that moves relative to the base casing in a screw tightening direction; and a screw supply device provided in the feeder casing, wherein the screw supply device is the feeder. A screw feeding device of a continuous screw tightening machine that supplies a screw connection band into the base casing in conjunction with a relative movement of the casing with respect to the base casing,
At least one intermediate casing is provided between the base casing and the feeder casing. These casings are arranged in series in the screw tightening direction in the order of the base casing, the intermediate casing, and the feeder casing, and screw tightening. Connected to move in a relative direction ,
The intermediate casing is provided with rolling elements so as to be capable of rolling,
The rolling element abuts on the other casing and rolls by moving the intermediate casing relative to the other casing,
The rolling element passes through the wall surface of the cylindrical intermediate casing in the thickness direction, contacts the casing disposed outside the intermediate casing, and also contacts the casing disposed inside the intermediate casing. A screw feed device for a continuous screw tightening machine , wherein the three casings are in contact with each other and are moved relative to each other in the direction of screw tightening. A base casing attached to the screw tightening machine; a feeder casing that moves relative to the base casing in a screw tightening direction; and a screw supply device provided in the feeder casing, wherein the screw supply device is the feeder. A screw feeding device of a continuous screw tightening machine that supplies a screw connection band into the base casing in conjunction with a relative movement of the casing with respect to the base casing,
At least one intermediate casing is provided between the base casing and the feeder casing. These casings are arranged in series in the screw tightening direction in the order of the base casing, the intermediate casing, and the feeder casing, and screw tightening. Connected to move in a relative direction ,
The cylindrical intermediate casing is provided with a plurality of rolling elements in the screw tightening direction,
The intermediate casing and the casing disposed outside or inside the intermediate casing are configured to be supported at two or more positions in the screw tightening direction by at least two of the plurality of rolling elements . A screw feeder for a continuous screw tightening machine. A base casing attached to the screw tightening machine; a feeder casing that moves relative to the base casing in a screw tightening direction; and a screw supply device provided in the feeder casing, wherein the screw supply device is the feeder. A screw feeding device of a continuous screw tightening machine that supplies a screw connection band into the base casing in conjunction with a relative movement of the casing with respect to the base casing,
At least one intermediate casing is provided between the base casing and the feeder casing. These casings are arranged in series in the screw tightening direction in the order of the base casing, the intermediate casing, and the feeder casing, and screw tightening. Connected to move in a relative direction ,
The intermediate casing is provided with rolling elements so as to be capable of rolling,
The rolling element abuts on the other casing and rolls by moving the intermediate casing relative to the other casing,
The said rolling element is a cylindrical roller, The screw feeding apparatus of the continuous screw fastening machine characterized by the above-mentioned . A screw feeding device for a continuous screw tightening machine according to claim 1 ,
The rolling element is a pinion and is configured to mesh with a rack formed in a casing disposed outside the intermediate casing and a rack formed in the casing disposed inside the intermediate casing. A screw feeding device for a continuous screw tightening machine.

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